package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        //判断当前商品是否在购物车中
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        //如果在，数量加1
        if(list != null && list.size() > 0){
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() + 1);
            shoppingCartMapper.update(cart);
        }else {
            //如果不在，添加到购物车，数量默认1

            //判断购物车数据中是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId != null){
                //添加到购物车中的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setName(dish.getName());

            }else {
                //添加到购物车中的是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();

                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setName(setmeal.getName());

            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);

        }


    }

    @Override
    public List<ShoppingCart> ShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart
                .builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.cleanByUserId(userId);
    }

    @Override
    public void sub(ShoppingCartDTO shoppingCartDTO) {
        //判断当前商品是否在购物车中
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        Long dishId = shoppingCartDTO.getDishId();

        ShoppingCart cart = list.get(0);

        if( cart.getNumber() != 1){
            cart.setNumber(cart.getNumber() - 1);
            shoppingCartMapper.update(cart);
        }else {
            shoppingCartMapper.deleteByDishId(dishId);
        }

    }
}
